Request scope and session scope are important web application concepts. Request scope is short-live scope, request scope object only exists in one HTTP request. But session scope is long-live than request scope, session scope object exists between every request in an HTTP session. Spring provides annotations for you to make a java bean exist in […]
Spring MVC Request And Session Scoped Bean Example Read More »
Spring MVC form can be used to submit user data to web server, then web server logic bean can process those data and return related JSP view page back to the client. But before sending the data to the backend logic bean, it is better to validate the data value first, this can improve server
Spring MVC Form Validation Example With Annotation Read More »
This example will show you how to implement spring MVC form elements and how to process form submit action. It uses spring form:radiobutton to implement Html radio button, form:checkbox to implement Html checkbox, form:select to implement Html drop-down list.
Spring MVC Form Submit Example Read More »
After you install tomcat in macOS, you can start it and stop it with a command. Article How To Install Tomcat In MacOS has told you how to do that. But after you start it, you can not find the log data in the terminal like windows. This may make you crazy because you can
How To Show Live Tomcat Log In MacOS Read More »
The i18n is the abbreviation of internationalization, this is because there are 18 characters between the first i and the last n in the word internationalization. Its purpose is to display different language page content to different locale users in the same web application. This can make application development more efficient. Developers do not need
Spring MVC i18n Java Config Example Read More »
East-Asian character ( Chinese, Japanese, Korean ) is different from the western character. But our web application should be accessed from all over the world. So we should support display those east-Asian characters on the web page correctly. The solution to resolve the character charset issue is to use Unicode for all languages messages in
How To Convert East-Asian Character To Unicode In Java Read More »
When you create a dynamic web project ( such as spring MVC using sts ), you may encounter an error message like Dynamic Web Module 3.1 requires Java 1.7 or newer. This article will tell you how to fix it.
Eclipse Dynamic Web Module 3.1 requires Java 1.7 or newer Error Resolve Method Read More »
MongoDB is most popular today, it is a NoSQL database. This article will tell you how to install it on macOS correctly.
How To Install MongoDB On Mac Read More »
Python memory monitor is very important for debugging application performance and fix bugs. This article will introduce two popular python modules, memory_profiler, and objgraph. memory_profiler can monitor your app code memory usage for each line of code, objgraph can display the python objects relationship and generate an image to visualize it.
Python Profile Memory Usage And Object Graph Example Read More »
Node JS app executes in a single thread. But if your machine has multiple CPU cores, it can also use multiple CPU cores with it’s cluster module. This can improve hardware usage efficiency. So you can make your Node JS app more scalable.
Node JS Cluster Module With Web Server Example Read More »
